In real life, Kafka recorded the beginning of the First World War in his diary this way:
August 2, 1914: Germany has declared war on Russia. Went swimming in the afternoon.
That was it.
But, regardless of his lack of enthusiasm, Kafka believed in the duties of the citizen. He tried to join the army to fight. In fact, he tried to join a number of times. He was always refused because the government deemed his civil/government job was too important for him to relinquish.
But, near the end of the war, when Kafka was so sick he had lengthy periods of leave from his job to recuperate, the army came calling. Kafka had to appear before authorities with medical proof of his illness.
In my novel, Kafka In The Castle, I ‘fill in’ one of his diary entries describing such a situation.
07 February 1918
I find I must go to Prague at the end of next week. Such knowledge is proof that one should not open one’s mail. The Military yet again wishes to snare me, and I must once again prove that my hide is not worth the effort.
There were time (very rare) when my father would despair. Not his usual anger at the general incompetence and perfidy of the world around him, but a resignation to the belief that things would never get any better.
“If they want to drag me down,” he would say, “Then I may as well join them. I’ll go out into the street and let myself be swept away by the mob. I’ll become part of their common, grubby life, and let them wipe their boots on me.”
That is much as I feel right now. Let the army take me, dress me in their uniform, point me toward the Americans, and have some cowboy shoot me. Going into battle could be no worse than going into Prague.